Arsenic-antimony compound and process of making same.



UNITED sures PATENT OFFICE.

ALFRED BERTHEIM AND PAUL KARREB, OF FBANKFORT-ON-THE-MAIN, GERMANY,

ASSIGNORS T FABBWEBKE VOBM. MEISTER LUCIUS & BRUNING, OF HOCHST-ON- THE-MAIN, GERMAQIY, A CORPORATION OF GERMANY.

ABSENIC-ANHIIIONYCOMPOUND AND PROCESS OF MAKING SAME.

1E0 Drawing.

. To all whom it may concern:

Be it known that we, ALFRED BERTHEIM, Ph. D., rofessor "of chemistry, and PAUL KARRER, h. 1)., chemist, citizens of the Empire of Germany and Switzerland, respectively, residing at Frankfort-on-the-Main, Germany, have invented certain new and useful Improvements in Arsenic-Antimony Compounds and Processes of Making Same,

of which the following is a specification.

We have found that by reducing a mixture of an aromatic arsinic acid with an antimony compound, such, for instance, as tar;

tar emetic (potassium-antimony-tartrate),

phenylstibinic acid or oxyphe'nylstibinic acid, compounds are obtained containing arsenic and antimony, and inwhich most probably the atom group As=Sb is contained. In practice the method for producing the said compounds is as follows: An aromatic arsinic acid and an: antimony compound are dissolved and then mixedin quantities proportionate to their equivalent weights, whereupon a strong reducing agent, such as sodium hydrosulfite, is added. As intermediate products are obtained arsenoxids which correspond to the ar'sinic acids, and which are therefore to be regarded in this process as equivalents of the latter. The said new compounds are insoluble in water, but soluble in diluted hydrochloric acid or diluted caustic soda-lye, they form colored powders and are of therapeutical' value for the treatment of infectious diseases.

Specification of ietters Patent. Application filed September 24, 1913. Serial No. 791,550.

Patented Sept. 29, 1914.

sinic acid in 400 cc. of waterand 60 cc.-'of 2N caustic soda-lye, and, on the other hand, 33.2 grams of tartar emetic in 650 cc. of water, whereupon the two solutions, are mixed. This mixture is run into a solution of 500 grams of concentrated sodium hydrosulfit'e and 100 grams of magnesium chlorid in 2.5 liters of water and the Whole is digested, While well stirring at 50-55 until a filtered sample no longer yields a precipitate when heated. The precipitate which is copiously formed is filtered, washed and dried in a vacuum. It then forms a reddish-brown powder which is clearly soluble in dilute hydrochloric acid and in aqueous caustic soda-lye.

Having now described our invention, what we claim is:

1. The process of preparing organic 'arsenic' antimony. compounds, which consists in treating with a strong reducing agent the mixture of an aromatic arsinic acid and an antimony compound in solution.-

2. As new products, organic arsenic-antimony compounds containing most probably the atom group -As=Sb-, the arsinic atom being linked to an aromatic radical; said compounds being colored powders, 1n-

soluble in water, but soluble in diluted hy-" drochloric acid and diluted caustic soda-lye.

In testimony whereof, we affixour signatures in'presence of two witnesses. 

